Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lawrence County, Arkansas
EPA puts Lawrence County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
6.8%
Pulaski County, 111 miles
- Pulaski
- 6.8%
- Arkansas
- 22.7%
Share at 4+ pCi/L, 103 tests, 2007 to 2016
Ground above low
33.8%
12.5 pts above Arkansas
- Lawrence
- 33.8%
- Arkansas
- 21.3%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Lawrence
- 1
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Lawrence County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Lawrence County, At a glance
Lawrence County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 66% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lawrence County, 2008 to 2017, laboratory
CDC holds 1 reported test for Lawrence County over the 2008 to 2017 laboratory totals, a result of 1.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lawrence County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Lawrence County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Lawrence County, Compared
Lawrence County radon figures, compared
Calculated by Radon411CDC's largest figure for Lawrence County rests on 1 test over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 1.9 pCi/L, with a middle value of 1.9 pCi/L.
The nearest counties with a figure are Pulaski County (111 miles away) at 6.8%, Saline County (131 miles away) at 31.9% and Garland County (153 miles away) at 45.8%. Pooled across 60 Arkansas counties, 22.7% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Statewide for the same period, Garland County reported the highest share (45.8%) and Pulaski County the lowest (6.8%). EPA's 1993 map puts Lawrence County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 66% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lawrence County, Geology
The ground under Lawrence County
PredictedUSGS's geologic map splits Lawrence County: 66.2% of its land is low radon potential and 33.8% moderate. The map puts 66.2% of Lawrence County in the area it calls Mississippi Alluvial Plain and 33.8% in Salem Plateau. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 66.2% |
| Salem Plateau | Ordovician dolomite. | Moderate | 9 | 33.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lawrence County beside the ground around it
Lawrence County has more moderate-potential ground than Arkansas as a whole: 33.8% of its land against 21.3%. Of the 6 counties that border it, 4 have more moderate-potential ground, Sharp County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Lawrence County, Local resources
Radon testing and mitigation in Lawrence County
- Arkansas's radon programArkansas Department of HealthArkansas's radon program answers questions about testing, mitigation and the rules in Arkansas.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Arkansas directoryNo professionals are listed in Arkansas yet. The state program can point you to registered testers and mitigators.
What Arkansas's program says
- Phone
- 501-661-2621
- ADH.EPI.Radon@arkansas.gov
What it means
Lawrence County, Questions
Questions about radon in Lawrence County
Are radon levels high in Lawrence County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Lawrence County, Arkansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of the 5 nearest counties with a figure, within 177 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.
Which counties border Lawrence County?
Lawrence County borders 6 counties: Randolph County, Sharp County, Craighead County, Jackson County, Greene County and Independence County.
Products
Lawrence County, Products
Testing a home in Lawrence County
No CDC figure names Lawrence County; the nearest county with one, Pulaski County (111 miles away), reported 6.8% of its tests at or above 4 pCi/L over the 2007 to 2016 laboratory totals, the only reading nearby until a test of this home. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Lawrence County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lawrence County, Bordering counties
Counties bordering Lawrence County
Calculated by Radon411- Radon levels in Randolph CountyEPA zone 2
100.0%at or above 4 pCi/L
Median 4.9 pCi/L · 1 test
- Radon levels in Sharp CountyEPA zone 2
44.4%at or above 4 pCi/L
Median 2.9 pCi/L · 9 tests
- Radon levels in Independence CountyEPA zone 2
26.7%at or above 4 pCi/L
Median 2.4 pCi/L · 15 tests
- Radon levels in Craighead CountyEPA zone 3
10.0%at or above 4 pCi/L
Median 0.9 pCi/L · 20 tests
- Radon levels in Jackson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Greene CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 3 tests
Lawrence County, Cities and towns
Cities and towns in Lawrence County
Lawrence County's population has barely moved since 2020: 16,273 residents on July 1, 2025 against 16,221 then, by the Census Bureau's estimates. That works out to 28 people per square mile of land. Its largest town, Walnut Ridge, has 5,478 residents, 33.7% of the total. Together its 13 incorporated places hold 69.8% of those residents; the other 30.2% live outside any of them. Reported testing is thin here: 1 test over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Arkansas as a whole comes to 0.2.
From Walnut Ridge to Smithville, CDC publishes no figure by town: each reads Lawrence County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Walnut Ridge | 5,478 | +1.4% | 33.7% |
| Hoxie | 2,568 | −1.3% | 15.8% |
| Black Rock | 697 | +18.1% | 4.3% |
| Imboden | 627 | −2.3% | 3.9% |
| Portia | 515 | +22.6% | 3.2% |
| Ravenden | 415 | −2.8% | 2.6% |
| Strawberry | 259 | −2.6% | 1.6% |
| Lynn | 242 | −2.8% | 1.5% |
| Sedgwick | 157 | −2.5% | 1.0% |
| Alicia | 136 | −3.5% | 0.8% |
| Powhatan | 100 | −3.8% | 0.6% |
| Minturn | 86 | −2.3% | 0.5% |
- Smithville
13 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Lawrence County, Homes
Homes in Lawrence County
Lawrence County is a place of houses on their own lots: 79% of its 7,585 homes are detached single-family houses, against 70% across Arkansas. The homes are older than Arkansas' as a whole: half were built before 1977 (1987 for Arkansas), and 18% date from before 1960. 68% of occupied homes are lived in by their owner (Arkansas: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Lawrence County | Arkansas |
|---|---|---|
| Housing units | 7,585 | 1,382,664 |
| Detached houses | 79% | 70% |
| In buildings of 5 or more | 3% | 10% |
| Mobile homes | 11% | 11% |
| Built before 1960 | 18% | 14% |
| Built since 2000 | 13% | 28% |
| Middle year built | 1977 | 1987 |
| Owner-occupied | 68% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.